- USA, Institute for Nuclear Theory, University of Washington, Seattle, International Summer Program "The neutron star crust and surface", czerwiec - lipiec 2007
- USA, Department of Physics, The University of Texas at Brownsville, research stay, lipiec 2005
- USA, Department of Physics and Astronomy, University of Nevada, Las Vegas, visiting professor, styczeń - czerwiec 2005
- Indie, GMRT Pune, visiting professor, lipiec - sierpień 2003
- Niemcy, Potsdam Astrophysical Observatory, Alexander von Humboldt Fellow research stay, listopad 2002 - luty 2003
- Chiny, Instytut Astronomii Universytetu Pekińskiego, visiting professor, czerwiec 2002
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